Rafael Candela Sanz was a chess player, International Judge for chess composition and chess composer. He composed direct mates, selfmates (see for instance this s#3), helpmates, retro or fairy problems (especially reflex mates such as this one).

Bas de Haas composes direct mates, helpmates and fairy problems. In 1998 he wrote an interesting article in Probleemblad (July-August issue) about Equihopper problems, which Juraj Lörinc echoed on his website.